A killer is on the loose in England, and he has very specific targets: women accused of killing their babies. Some of these women have been convicted, some found not guilty. Some have been released on appeal to a general consensus that they
are innocent, while others have been released but may well have done the crime. The obsession spreads further to doctors who testified either for the prosecution or the defense--especially one doctor who is about to have her license revoked due to her testimony in scores of these cases.

Fliss Benson becomes entangled in this web due to her work in television documentary production and
as an assistant producer at a company whose star is determined to tell the story of these women. He perceives them all as innocent and is instrumental in getting several released on appeal and in hounding the doctors who
put them behind bars with her expert testimony. The star decides to leave for another company, and the documentary is dumped in Flissís lap.

One of the released women is terrorized on the street, then another one is killed. The killer leaves a card with four rows of what appear to be random numbers on each of their bodies. Fliss is pulled even further into the mystery when she begins to receive the same cards with the same numbers. Can she solve the mystery before the killer targets her?

Sophie Hannah has written a series of taut, engaging mysteries with fresh,
striking characterizations. The interplay and politics in the police department
alone are worth reading the book for, with the interesting character of DC Simon Waterhouse, a detective who can figure out the most complex motivations. This book was originally published in England as
A Room Swept White. Readers of mysteries will be captivated and rush to read more of Hannahís work.